Brown Bear: Traits and Habits of a Widespread Species
Everything about the brown bear: size, subspecies, habitat, diet, hibernation, reproduction, conservation, and the strange facts that make Ursus arctos the most widely distributed bear on Earth.
June 2025
December 2024
Brown Bear Diet: From Salmon to Roots
Brown bears eat 80% plants: berries, nuts, roots. Coastal Alaskan bears gorge on 40 kg of salmon per day. Full diet by region, season, and subspecies.
Kodiak Bear: The Largest Brown Bear
Kodiak bears average 270-630 kg, with record specimens past 750 kg. Isolated on Alaskan islands 12,000 years, salmon runs built the world's biggest brown bear.
How Fast Can a Brown Bear Run? Top Speed
Brown bears sprint 48-56 km/h. A 600 kg Kodiak gallops faster than an Olympic sprinter. The biomechanics, limits, and what that means for humans in bear country.
November 2024
How Big Are Brown Bears? Size and Weight
Brown bears range from 100 kg Gobi bears to 750 kg Kodiaks. Full size breakdown by subspecies, region, and diet, with the biggest specimens on record.
Bear Hibernation: Key Biological
Kodiak bears are brown bears too, but isolated on Kodiak Island for 12,000 years they grew to 600+ kg on salmon-rich diets. How they differ from interior grizzlies.
European Brown Bear: Distribution Across Key Regions
Romania holds 6,000+ brown bears, Europe's largest population. Full breakdown of brown bear range across 22 European countries with current numbers and trends.
Brown Bear vs Grizzly Bear: Same Species, Different Name
Every grizzly IS a brown bear, but not every brown bear is a grizzly. Untangling the taxonomy, regional names, and why coastal bears are bigger than inland.
Brown Bear Subspecies: 16 Distinct Types
Every brown bear on Earth is Ursus arctos, but subspecies range from 750 kg Kodiaks to 30 surviving Gobi bears. The full taxonomy, minus the obsolete names.
Brown Bear Hibernation: Duration and Heart Rate
Scandinavian brown bears hibernate 6-7 months; Romanian bears 4-5. Heart rate drops to 8 bpm, females give birth mid-sleep. Physiology, dens, climate effects.
Brown Bear Cubs: Winter Births and Maternal Bonds
Brown bear cubs weigh 350-500 g at birth mid-hibernation. The mother-cub bond, infanticide risk from boars, and how maternal care shapes survival.
Are Brown Bears Threats to Humans? Data
Brown bears kill 6-10 people per year worldwide. Romania, Russia, and Japan lead in attacks. The data, cases, and why habituated bears are more dangerous.